undefined reference

Hey! When trying to compile the code for a ordered vector class I get the following error:
[Linker error] undefined reference to `WinMain@16'

Anyone have any idea what I might be doing wrong? This is driving me crazy and any help would be greatly appreciated.

Code is as follows:

Code:

#include <stdlib.h>
#include <iostream>
#ifndef _ORDEREDVECTOR_H
#define _ORDEREDVECTOR_H

template <class Object>
class orderedVector
{
    public:
        orderedVector(int n);
        orderedVector( );
        orderedVector(const orderedVector & v);
        virtual ~orderedVector( );
        void dissolve ( );
        void add (const Object x);
        void remove (const Object x);
        void removeAt (int i);
        Object & operator [](int i);
        int length( ) const;
        bool isEmpty( ) const;
        bool contains(const Object x);
    private:
        Object * buffer;
        int size, capacity;
        void reserve(int newCapacity);
        void resize(int newCap) {reserve(newCap);}
    };
    
    template <class Object>
    orderedVector<Object>::orderedVector( ) :size(0),capacity(0),buffer(0){}
    
    template <class Object>
    orderedVector<Object>::orderedVector(int n): size(0), capacity(n), buffer(0) 
    {
        if (n < 0)
        {
            cerr << "Error: You can't create a vector with a negative capacity!\n";
            exit(1);
        }
    }
    
    template <class Object>
    orderedVector<Object>::orderedVector(const orderedVector & v) 
    {
        if (this == &v) 
        {
            cerr << "Error: You can't copy a vector onto itself!\n";
            exit(1);
        }
        buffer = 0;
        buffer = new Object[v.capacity];
        size = v.length( );
        capacity = v.capacity;
        
        for (int i = 0; i < v.length( ); i++) 
        {
            buffer[i] = v.buffer[i];
        }
    }
    
    template <class Object>
    orderedVector<Object>::~orderedVector( ) 
    {
        delete [ ] buffer;
    }
    
    template <class Object>
    void orderedVector<Object>::add(const Object x) 
    {
        if (size == capacity)
                resize(capacity + 5);
        
        if (size == 0)
                buffer[0] = x;
        else 
        {
            for (int i = 0; i < size; i++) 
            {
                if (x <= buffer[i])
                {
                    int j = size;
                    while (j > i) 
                    {
                        buffer[j] = buffer[j-1];
                        j--;
                    }
                    buffer[i] = x;
                }
            }
        }
        size++;
    }
    
    template <class Object>
    void orderedVector<Object>::remove(const Object x) 
    {
        bool temp;
        for (i = 0; i < size; i++) 
        {
            if (buffer[i] == x)
                temp = true;
            else
                temp = false;
        }
        
        if (temp == false) 
        {
            cerr << "Error: Object doesn't exist!\n";
            exit(1);
        }
            
        else 
        {
            for (int i = 0; i < size; i++)
            {
                int j = i;
                while (j < size - 1) 
                {
                    buffer[j] = buffer[j+1];
                    j++;
                }
            }
            size--;    
        }
    }
    
    template <class Object>
    void orderedVector<Object>::removeAt(const int i) 
    {
        if (i < 0 || i >= size) 
        {
             cerr << "Error: Index out of range!\n";
             exit(1);
        }
        
        int j = i;
        while (j < size - 1)
        {
           	buffer[j] = buffer[j+1];
            j++;
        }
        size--;
   }
   
   template <class Object>
   Object & orderedVector<Object>::operator [] (int i)
   {
        if (i < 0 || i >= size) 
        {
             cerr << "Error: Index out of range!\n";
             exit(1);
        }
        return buffer[i];
   }
   
   template <class Object>
   int orderedVector<Object>::length( ) const 
   {
       return size;
   }
   
   template <class Object>
   bool orderedVector<Object>::isEmpty( ) const 
   {
       return size == 0;
   }
   
   template <class Object>
   bool orderedVector<Object>::contains(const Object x) 
   {
        bool temp;
        for (i = 0; i < size; i++) 
        {
            if (buffer[i] == x)
                temp = true;
            else
                temp = false;
            
        }
        return temp;
    }
    
    template <class Object>
    void orderedVector<Object>::reserve(int newCap)
    {
        if (buffer == 0)
        {
            size = 0;
            capacity = 0;
        }
        
        if (newCap <= capacity)
                return;
        
        Object * newBuffer = new Object[newCap];
        
        for (int i = 0; i < size; i++)
                newBuffer[i]=buffer[i];
                
        capacity = newCap;
        delete [ ] buffer;
        buffer = newBuffer;    
    }
#endif

You're not really doing anything wrong. In fact, if you get a linker error your code's (probably) compiling fine, but a linker is meant to make a working executable file. Since this is just part of a program, you can't compile it any further than an object file. In other words, if you want to stop getting that error, either build a program around that class (using a main or WinMain function) or disable linking in your IDE. (assuming you're using an IDE)

If you want to make this into a library for later use, you'll have to do some other stuff.

You're using a compiler that targets windows, and is configured to create a windows application (for which the starting function is named something like winmain() rather than main()).

Look into configuration options for your compiler, and look for a setting concerned with creating console applications. A console application is essentially one that starts with main() rather than winmain().

That is a generic description. If youy identify your compiler (and version) someone may be able to give you more specific hints to fix your problem.

I'm using Bloodshed Dev-C++, version 4.9.9.0

Then use:
Execute -> Compile

Or the compile button which is the four little boxes icon.

I am running the compile, thats when the error shows up under messges.

Tools -> Compiler Options
Check the box that says "Add the following commands when calling compiler:"
then inside the big box put

-c